From: "knu (Akinori MUSHA)" <knu@...>
Date: 2013-02-04T14:11:38+09:00
Subject: [ruby-dev:46918] [ruby-trunk - Feature #7639] More freedom for location of comments


Issue #7639 has been updated by knu (Akinori MUSHA).


It was meant to be and has been an experimental feature, so let's not take it for granted as established one.
We already have it so why not extend it is not the way to go.
If a problem is found, we need to reconsider and address downsides before it's too late.

I personally think that this line continuation rule should be withdrawn/obsoleted because it is one of few exceptions that breaks the golden general rule that "If a statement is syntactically complete at a line end, then it is the end of the statement."
----------------------------------------
Feature #7639: More freedom for location of comments
https://bugs.ruby-lang.org/issues/7639#change-35823

Author: sawa (Tsuyoshi Sawada)
Status: Feedback
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: core
Target version: Next Major


=begin
When we chain methods with the period at the end of each line, we can put comments in between the lines:

    [1, 2, 3].
    # First, we do blah blah
    method1.
    # Second, we do blah blah
    method2.
    =begin
      Third, the following line
      does this
      and that ...
    =end
    method3

but when we have the period at the beginning of the line, putting comments in similar positions returns an error:

    [1, 2, 3]
    # First, we do blah blah
    .method1
    # Second, we do blah blah
    .method2
    =begin
      Third, the following line
      does this
      and that ...
    =end
    .method3

    # => Error

It is confusing that putting comments between lines in a method chain is sometimes allowed and sometimes not. I think it would be convenient if comments are allowed in these positions even when the following line starts with a period, and I request this as a feature. Currently, it returns an error, which means that, if such syntax were allowed, there would be no conflict with the existing syntax.

Furthermore, putting the period at the beginning of a line is suited for method chains because the period will visually work as bullets, and it makes more sense to have comments right before those lines.
=end



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